CN105320064B - Numerical controller having function of assisting analysis of equipment abnormality history - Google Patents
Numerical controller having function of assisting analysis of equipment abnormality history Download PDFInfo
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- CN105320064B CN105320064B CN201510455385.5A CN201510455385A CN105320064B CN 105320064 B CN105320064 B CN 105320064B CN 201510455385 A CN201510455385 A CN 201510455385A CN 105320064 B CN105320064 B CN 105320064B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0267—Fault communication, e.g. human machine interface [HMI]
- G05B23/0272—Presentation of monitored results, e.g. selection of status reports to be displayed; Filtering information to the user
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/34—Director, elements to supervisory
- G05B2219/34475—Detect abnormality of control system without inverted model, using input command
Abstract
The numerical controller having the analysis support function for the device abnormality history includes a drawing unit that generates a tool image based on CNC information that is configured by associating the operation state information of the machine tool at the time when the abnormality is detected by the abnormality detection unit with information relating to the detected abnormality, and arranges and draws the tool image in a coordinate space.
Description
Technical Field
The present invention relates to a numerical controller, and more particularly to a numerical controller having an analysis support function for an equipment abnormality history.
Background
In a machine tool controlled by a numerical controller, when it is detected that an abnormal load or the like occurs in a main spindle of the machine tool, there is a technique of storing so-called CNC information such as coordinate values of the main spindle of the machine tool, an actual speed, a tool offset set from the numerical controller during the machining, and a machining program during operation in a storage device provided in the numerical controller, and using the CNC information (for example, international publication No. 00/10769).
When an operator operating the machine tool has a device abnormality such as a reduction in machining accuracy of a workpiece, the operator can determine whether or not there has been a problem relating to the reduction in machining accuracy, such as a spindle collision, by analyzing the stored CNC information.
When it is possible to determine the cause of the spindle collision or the like associated with the equipment abnormality by analyzing the CNC information, it is possible to confirm the tool offset, the machining program, and the like stored in the same chance as the spindle collision, and to specify the cause of the spindle collision such as an input error of the tool offset, a program error of the machining program, and the like.
In such a technique, it is possible to store, as a history, not only CNC information relating to a problem that has recently occurred, but also a plurality of pieces of CNC information when a problem has occurred during the machining of a workpiece, and thus it is possible to trace back whether or not a spindle collision or the like has occurred. However, since the heavy cutting and the spindle collision cannot be accurately determined by the automatic analysis of the equipment, CNC information with a high possibility of spindle collision is automatically stored according to the conditions set by each equipment manufacturer as shown in fig. 7, and the operator analyzes the CNC information accumulated thereafter to determine whether or not the spindle collision has occurred.
However, in the conventional technique, when it is estimated that a problem has occurred in the machine tool, CNC information is stored even if the problem is slight, and therefore, as shown in fig. 8, a large amount of CNC information is stored in 1 numerical controller. In addition, in order to extract CNC information related to equipment abnormality such as a spindle collision from such a large amount of CNC information, an operator needs to analyze each piece of CNC information, which causes a problem of taking time for investigation.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a numerical controller that enables an operator to clearly grasp CNC information with a problem from among a large amount of stored CNC information.
A numerical controller having an analysis support function for an equipment abnormality history according to the present invention controls a machine tool having a spindle provided with a tool according to a machining program, the numerical controller including: an abnormality detection unit that detects an abnormality occurring during control of the spindle; a data storage unit that stores CNC information in which operation state information of the machine tool including coordinate values of the main spindle at a time when the abnormality is detected by the abnormality detection unit and information relating to the detected abnormality are associated with each other; and a drawing unit that generates a tool image based on the CNC information, and arranges and draws the tool image on a coordinate space based on the coordinate values.
The data storage unit stores a plurality of CNC information, and the drawing unit draws a plurality of tool images generated based on the plurality of CNC information on a coordinate space.
The CNC information processing apparatus further includes an emphasis condition setting unit configured to set an emphasis condition regarding the CNC information item, and the drawing unit draws the tool image generated from the CNC information satisfying the emphasis condition in a coordinate space with emphasis when it is determined that the CNC information satisfies the set emphasis condition.
The above-described emphasis condition is at least one of (1) a case where the main shaft is not rotated but has an impact value, (2) a case where the main shaft is not loaded but has a load on the feed shaft, (3) a case where the command speed or the remaining movement amount of the main shaft is not 0 but the actual speed is 0, and (4) a case where the main shaft is rapidly fed but the load on the main shaft is high.
The information of the abnormality includes an impact value of the spindle detected by the abnormality detection unit, and the drawing unit changes the appearance of the tool image based on the impact value.
The operation state information includes a command speed of the spindle and an actual speed of the spindle, which are commanded by the machining program, and the drawing unit changes the appearance of the tool image based on the command speed and the actual speed.
The operation state information includes a tool offset value of the spindle, and the drawing unit changes an appearance of the tool image based on the tool offset value.
The operation state information includes a moving direction of the spindle, and the drawing unit changes an appearance of the tool image according to the moving direction.
The operation state information includes a posture of the tool included in the spindle, and the drawing unit changes an appearance of the tool image according to the posture of the tool.
According to the present invention, since a plurality of pieces of CNC information are graphically displayed on a screen, and data with a high possibility of occurrence of a spindle collision can be determined at a glance, it is possible to shorten the time for an operator to analyze an equipment abnormality such as a spindle collision, and to investigate the presence or absence of a spindle collision in the past in a short time, for example, when the machining accuracy of a machine tool is degraded, and thus, it is possible to use the present invention for maintenance of the machine tool.
Drawings
The above and other objects and features of the present invention will become apparent from the following description of the embodiments with reference to the accompanying drawings. In these drawings:
fig. 1 is a block diagram of a main part of a numerical controller according to an embodiment of the present invention.
Fig. 2 is a functional block diagram of a numerical controller according to an embodiment of the present invention.
Fig. 3 is a diagram illustrating a CNC information database according to an embodiment of the present invention.
Fig. 4 is a diagram showing an example of a tool image according to the embodiment of the present invention.
Fig. 5 is a diagram showing an example of display of CNC information according to the embodiment of the present invention.
Fig. 6 is a flowchart of the tool image drawing process according to the embodiment of the present invention.
Fig. 7 is a diagram showing an outline of a CNC information storage function of the related art.
Fig. 8 is a diagram illustrating a problem of the related art.
Detailed Description
Fig. 1 is a block diagram of main portions of a numerical controller according to an embodiment of the present invention, a processor (CPU)11 of the numerical controller 10 is a processor for controlling the numerical controller 10 as a whole, the processor 11 reads a system program stored in a ROM12 via a bus 21, and controls the numerical controller 10 as a whole in accordance with the system program, and temporary calculation data and display data, various data input by an operator via a L CD/MDI unit 70, and the like are stored in a RAM 13.
The SRAM14 is supported by a battery, not shown, and is configured as a nonvolatile memory capable of holding a memory state even when the power supply of the numerical controller 10 is turned off, and stores a machining program, which will be described later, read through the interface 15, a machining program input through the L CD/MDI unit 70, and the like, and in addition, various system programs for executing processing of an edit mode and processing of automatic operation required for generating and editing a graphic display program and a machining program required for displaying CNC information are written in advance in the ROM 12.
The interface 15 is an interface for an external device connectable to the numerical controller 10, and is connected to an external device 72 such as an external storage device. A machining program and the like are read from an external storage device. The PMC (programmable machine controller) 16 controls auxiliary devices and the like on the machine tool side by a sequence program built in the numerical controller 10. That is, signals required on the auxiliary device side are converted by these sequence programs in accordance with the M function, S function, and T function instructed by the machining program, and output from the I/O unit 17 to the auxiliary device side. Various actuators and other auxiliary devices operate based on the output signal.
Signals from various switches of the operation panel provided in the machine tool main body are received, subjected to necessary processing, and then transferred to the processor 11.
The current position of each axis of the machine tool, an alarm, a parameter, image data and other image signals are transmitted to the L CD/MDI unit 70 and displayed on the display thereof L CD/MDI unit 70 is a manual data input device having a display, a keyboard and the like, and the interface 18 receives data from the keyboard of the L CD/MDI unit 70 and transfers the data to the processor 11.
The interface 19 is connected to a manual pulse generator 71, and the manual pulse generator 71 is attached to an operation panel of the machine tool, and is used for precisely positioning a movable portion of the machine tool in each axis control based on a distribution pulse generated by a manual operation.
An X, Y-axis control circuit for moving the table of the machine tool and Z-axis control circuits 30 to 32 receive movement commands for the respective axes from the processor 11 and output the commands for the respective axes to servo amplifiers 40 to 42. The servo amplifiers 40 to 42 receive the command and drive servo motors 50 to 52 of the axes of the machine tool. The servo motors 50 to 52 of the respective axes are provided with pulse encoders for position detection, and position signals from the pulse encoders are fed back as pulse trains.
The spindle control circuit 60 receives a spindle rotation command for the machine tool, and outputs a spindle speed signal to the spindle amplifier 61. The spindle amplifier 61 receives the spindle speed signal, and rotates a spindle motor 62 of the machine tool at the instructed rotation speed to drive the tool.
The position encoder 63 is coupled to the spindle motor 62 by a gear, a belt, or the like, and the position encoder 63 outputs a feedback pulse in synchronization with the rotation of the spindle, and the feedback pulse is read by the processor 11 via the interface 20. Reference numeral 65 denotes a clock circuit for performing adjustment to synchronize with the current time.
In addition, the machine tool includes various sensors (not shown) for state detection, such as a position sensor, a speed sensor, and an impact sensor, for example, in the spindle motor, and a detection signal from the sensors is read by the processor 11 via an interface (not shown).
Fig. 2 is a functional block diagram of the numerical controller 10 according to the embodiment of the present invention. The numerical controller 10 includes an operation execution unit 110, an abnormality detection unit 120, a data storage unit 130, and a drawing determination/drawing calculation unit 140.
The operation execution unit 110 outputs a command to each axis control circuit, the main spindle control circuit, and the like, based on a program command of the machining program 200, a system program, and the like read from the SRAM14 and the like, executes operation control of the machine tool, and outputs various parameters such as a command speed for the main spindle used for the operation control and a set tool offset to the abnormality detection unit 120.
The abnormality detection unit 120 analyzes a signal detected by a sensor provided in the machine tool, and stores CNC information such as a tool offset, a machine coordinate value, a position of a rotary shaft, a remaining movement amount, a command speed, an actual speed, and an impact value in association with a current time in the data storage unit 130 based on a parameter acquired from the operation execution unit 110 and a signal output from the sensor provided in the machine tool each time it is determined that an abnormality occurrence condition of the machine tool set in advance in the SRAM14 or the like of the numerical controller 10 is satisfied.
The data storage unit 130 is a storage area provided in a memory such as the SRAM14, and includes a CNC information database therein. Fig. 3 is a diagram showing an example of the CNC information database. Although fig. 3 shows a part of the CNC information database items, what items are set in the CNC information database may be set as necessary items according to the type and characteristics of the machine tool to be controlled, the installation environment of the machine tool, and the like, and the drawing process described later may be performed.
When the operator performs maintenance work, the drawing determination/drawing calculation unit 140 operates L the CD/MDI unit 70, and when a CNC information drawing command is instructed to the numerical controller 10, reads CNC information stored in the data storage unit 130, generates a plurality of tool images based on the CNC information, and performs drawing processing for drawing an image in which the generated tool images are arranged in the three-dimensional coordinate space system on the screen of the L CD/MDI unit 70.
The outline of the drawing process executed by the drawing determination/drawing calculation unit 140 according to the present embodiment will be described below.
Fig. 4 is a diagram showing an example of a tool image based on CNC information generated by the drawing determination/drawing calculation unit 140. In the present embodiment, it appears that the operator can intuitively grasp the operation state of the machine tool and the state of the spindle at the time when the CNC information is recorded, that is, at the time when a phenomenon occurs, based on the shape and appearance of the tool image. In the present embodiment, as shown in fig. 4, the tool image is mainly represented by a schematic diagram of the tip of the spindle and the tool attached to the tip of the spindle. In the tool image of fig. 4, the color of the tool indicates the load generated on the spindle, and for example, when the load detected when a phenomenon occurs is a large value, the tool is displayed in red. The inclination of the tool indicates the posture of the tool, and it can be confirmed in which direction the tool is directed when a phenomenon occurs. The tool length indicates the tool length (tool offset value), and it can be confirmed whether or not the correct tool offset value is set. The magnitude of the vector displayed at the tool tip is expressed by the difference between the commanded speed and the actual speed at the time of occurrence of the phenomenon, and the amount by which the tool cannot move in accordance with the commanded amount due to an impact or the like can be confirmed. The direction of the vector displayed at the tool tip is indicated by the amount of residual movement at the time of occurrence of the phenomenon, and the direction of movement of the tool can be confirmed.
Fig. 5 shows an example in which a plurality of tool images generated based on CNC information are arranged in a three-dimensional coordinate space system and drawn on a screen of the L CD/MDI unit 70, and as shown in fig. 5, the position of a tool displayed in the coordinate space is determined based on a coordinate value at the time of occurrence of a phenomenon, and it is possible to confirm whether or not there is no tool at an erroneous position.
Further, a predetermined condition related to the CNC information is set, and the CNC information satisfying the condition is estimated not to be normal axis movement, and a tool image based on the CNC information is displayed in front of the other tool images and highlighted, and the predetermined condition may be set in advance in the SRAM14 or the like, or may be input through the L CD/MDI unit when the operator uses the drawing determination/drawing calculation unit 140 during maintenance work.
In the example of fig. 5, 4 tool images are displayed in front of the image with higher emphasis than other tool images, and the other tools are displayed with lightness and inconspicuousness, so that the 4 tool images to be noticed can be easily understood. Further, it is possible to grasp at a glance, from each of the 4 tool images, that is, it is possible to grasp, from the tool length being short, an input error in which a tool is offset when a phenomenon occurs; B. the tool can be grasped to move to a position irrelevant to cutting when a phenomenon occurs according to the position of the tool image; C. according to the direction of the front end vector of the tool, the fact that the tool does not move towards the workpiece when a phenomenon occurs can be grasped; D. from the length of the tool tip vector and the color of the tool, it can be grasped that a high load is applied to the spindle when a phenomenon occurs.
Fig. 6 is a flowchart of the drawing process executed by the drawing determination/drawing calculation unit 140 according to the embodiment of the present invention.
[ S601] the operator operates L the CD/MDI unit 70 to instruct the numerical controller 10 of a CNC information drawing command together with the classification conditions of the CNC information, and the occurrence date, the moving direction of the tool, the impact value, and the like can be specified as the classification conditions.
The abnormality detection unit 120 performs abnormality detection and classifies (rearranges) the plurality of CNC information recorded in the CNC information database of the data storage unit 130 according to the classification conditions indicated in S601.
[ S603] A coordinate space image is rendered on the screen of the L CD/MDI unit 70.
[ S604] CNC information accumulated in the CNC information database is sequentially read out, and the processing of S605 to S607 is repeated for all the CNC information.
[ S605] it is determined whether or not the read CNC information satisfies a condition for highlighting. The process proceeds to S606 when the condition for highlighting is satisfied, and proceeds to S607 when the condition for highlighting is not satisfied. The conditions for highlighting may be (1) a case where the spindle is not rotated but has an impact value, (2) a case where the spindle is not loaded but has a load on the feed axis, (3) a case where the command speed or the remaining movement amount of the spindle is not 0 but the actual speed is 0, (4) a case where the spindle is rapidly fed but has a high load, and the like, but may be appropriately set according to the type and characteristics of the machine tool to be controlled.
[ S606] A tool image is generated from the read CNC information, and the tool image is displayed in an emphasized manner on the coordinate space image drawn on the L CD/MDI unit 70.
[ S607] A tool image is generated based on the read CNC information, and the tool image is displayed on the coordinate space image drawn on the L CD/MDI unit 70.
Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can be implemented in other embodiments by applying appropriate modifications. For example, although the above-described embodiment shows the case where the drawing determination/drawing calculation unit 140 is installed in the numerical controller 10, the drawing determination/drawing calculation unit 140 may be installed in a computer other than the numerical controller 10, and the CNC information database recorded in the numerical controller 10 may be read from the outside and displayed on the screen of the computer.
Claims (7)
1. A numerical controller having an analysis support function for an equipment abnormality history, the numerical controller controlling a machine tool having a spindle provided with a tool according to a machining program, the numerical controller comprising:
an abnormality detection unit that detects an abnormality occurring during control of the spindle;
a data storage unit that stores CNC information in which operation state information of the machine tool including coordinate values of the main spindle at a time when the abnormality is detected by the abnormality detection unit and information relating to the detected abnormality are associated with each other;
a drawing unit configured to generate a tool image based on the CNC information, and to arrange and draw the tool image in a coordinate space based on the coordinate values; and
an emphasis condition setting unit that sets an emphasis condition relating to the item of the CNC information,
the data storage unit stores a plurality of the CNC information,
the drawing unit draws a plurality of the tool images generated based on a plurality of the CNC information on a coordinate space,
when it is determined that the CNC information satisfies the set emphasis condition, the drawing unit draws the tool image generated from the CNC information satisfying the emphasis condition and the tool image generated from the CNC information not satisfying the emphasis condition on the same coordinate space, and draws the tool image generated from the CNC information satisfying the emphasis condition with emphasis so as to draw the attention of an operator.
2. The numerical controller having an analysis support function for an equipment abnormality history according to claim 1,
the above-mentioned emphasis condition is at least one of a case where the main shaft is not rotated but has an impact value, a case where the main shaft is not loaded but has a load on the feed shaft, a case where the command speed or the remaining movement amount of the main shaft is not 0 but the actual speed is 0, and a case where the main shaft is rapidly fed but the load on the main shaft is high.
3. The numerical controller having an analysis support function for an equipment abnormality history according to claim 1 or 2,
the information of the abnormality includes an impact value of the spindle detected by the abnormality detecting means,
the drawing unit changes the appearance of the tool image according to the impact value.
4. The numerical controller having an analysis support function for an equipment abnormality history according to claim 1 or 2,
the operation state information includes a command speed of the spindle and an actual speed of the spindle commanded by the machining program,
the drawing unit changes the appearance of the tool image based on the command speed and the actual speed.
5. The numerical controller having an analysis support function for an equipment abnormality history according to claim 1 or 2,
the operating condition information includes a tool offset value of the spindle,
the drawing unit changes the appearance of the tool image according to the tool offset value.
6. The numerical controller having an analysis support function for an equipment abnormality history according to claim 1 or 2,
the operation condition information includes a moving direction of the spindle,
the drawing unit changes the appearance of the tool image according to the moving direction.
7. The numerical controller having an analysis support function for an equipment abnormality history according to claim 1 or 2,
the operation state information includes a posture of the tool provided in the spindle,
the drawing unit changes an appearance of the tool image according to a posture of the tool.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014153791A JP6434246B2 (en) | 2014-07-29 | 2014-07-29 | Numerical control device with machine abnormality history analysis support function |
| JP2014-153791 | 2014-07-29 |
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| CN105320064A CN105320064A (en) | 2016-02-10 |
| CN105320064B true CN105320064B (en) | 2020-07-31 |
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| CN105858349B (en) * | 2016-05-17 | 2019-03-15 | 广东溢达纺织有限公司 | Bobbin-winding machine spindle position efficiency measuring equipment and method |
| JP6571595B2 (en) * | 2016-06-30 | 2019-09-04 | ファナック株式会社 | Machine tool controller |
| JP6953690B2 (en) * | 2016-08-10 | 2021-10-27 | 株式会社ジェイテクト | Analysis system |
| WO2018235170A1 (en) * | 2017-06-20 | 2018-12-27 | ヤマザキマザック株式会社 | Machine tool management system and machine tool management method |
| JP7005419B2 (en) * | 2018-04-20 | 2022-01-21 | 株式会社日立製作所 | State identification device, state identification method, and mechanical device |
| EP3804923A4 (en) * | 2018-06-04 | 2021-07-14 | Nissan Motor Co., Ltd. | Abnormality determining device and abnormality determining method |
| JP7311329B2 (en) * | 2019-07-02 | 2023-07-19 | ファナック株式会社 | Estimation device and system |
| JP7348036B2 (en) | 2019-11-19 | 2023-09-20 | ファナック株式会社 | Program analysis device |
| CN111007833A (en) * | 2019-12-12 | 2020-04-14 | 西安锐驰电器有限公司 | Numerical control machine tool accident detection system |
| DE102020126780A1 (en) | 2020-10-13 | 2022-04-14 | Fritsch Bakery Technologies GmbH & Co. KG | Working machine with operating status display |
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| CN105320064A (en) | 2016-02-10 |
| DE102015009556A1 (en) | 2016-02-04 |
| US10054931B2 (en) | 2018-08-21 |
| JP6434246B2 (en) | 2018-12-05 |
| US20160033955A1 (en) | 2016-02-04 |
| JP2016031643A (en) | 2016-03-07 |
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